JS-XLS/X读取和解析Excel表格文件(xls/xlsx)的JavaScript插件
最近有一个要求，我的一个项目中解析Excel文件（与xls/xlsx扩展）在浏览器（使用JavaScript当然）。所以我在网上看了一下，发现了这2个有用的库：
让我们看看他们是如何工作的。
兼容性
支持读取文件格式
- Excel 2007+ XML Formats (XLSX/XLSM)
- Excel 2007+ Binary Format (XLSB)
- Excel 2003-2004 XML Format (XML “SpreadsheetML”)
- Excel 97-2004 (XLS BIFF8)
- Excel 5.0/95 (XLS BIFF5)
- OpenDocument Spreadsheet (ODS)
支持写文件格式
- XLSX
- CSV (and general DSV)
- JSON and JS objects (various styles)
Demo: http://oss.sheetjs.com/js-xlsx
Source: http://git.io/xlsx
JS-XLS
JS-XLS的安装是很简单的，在浏览器中使用该脚本文件，并使用脚本标记加载它：
<!-- https://github.com/SheetJS/js-xls/blob/master/xls.js --> <script src="/path/to/xls.js"></script>
对于Node.js，只要通过NPM安装：
$ npm install xlsjs $ node > require(‘xlsjs‘).readFile(‘excel_file.xls‘);
然后，我们可以简单地使用他们提供的代码在他们的index.html文件解析和转换的xls文件JSON，CSV或公式为基础的输出。
function get_radio_value( radioName ) {
var radios = document.getElementsByName( radioName );
for( var i = 0; i < radios.length; i++ ) {
if( radios[i].checked ) {
return radios[i].value;
}
}
}
function to_json(workbook) {
var result = {};
workbook.SheetNames.forEach(function(sheetName) {
var roa = XLS.utils.sheet_to_row_object_array(workbook.Sheets[sheetName]);
if(roa.length > 0){
result[sheetName] = roa;
}
});
return result;
}
function to_csv(workbook) {
var result = [];
workbook.SheetNames.forEach(function(sheetName) {
var csv = XLS.utils.make_csv(workbook.Sheets[sheetName]);
if(csv.length > 0){
result.push("SHEET: " + sheetName);
result.push("");
result.push(csv);
}
});
return result.join("\n");
}
function to_formulae(workbook) {
var result = [];
workbook.SheetNames.forEach(function(sheetName) {
var formulae = XLS.utils.get_formulae(workbook.Sheets[sheetName]);
if(formulae.length > 0){
result.push("SHEET: " + sheetName);
result.push("");
result.push(formulae.join("\n"));
}
});
return result.join("\n");
}
var tarea = document.getElementById(‘b64data‘);
function b64it() {
var cfb = XLS.CFB.read(tarea.value, {type: ‘base64‘});
var wb = XLS.parse_xlscfb(cfb);
process_wb(wb);
}
function process_wb(wb) {
var output = "";
switch(get_radio_value("format")) {
case "json":
output = JSON.stringify(to_json(wb), 2, 2);
break;
case "form":
output = to_formulae(wb);
break;
default:
output = to_csv(wb);
}
if(out.innerText === undefined) out.textContent = output;
else out.innerText = output;
}
var drop = document.getElementById(‘drop‘);
function handleDrop(e) {
e.stopPropagation();
e.preventDefault();
var files = e.dataTransfer.files;
var i,f;
for (i = 0, f = files[i]; i != files.length; ++i) {
var reader = new FileReader();
var name = f.name;
reader.onload = function(e) {
var data = e.target.result;
var cfb = XLS.CFB.read(data, {type: ‘binary‘});
//var arr = String.fromCharCode.apply(null, new Uint8Array(data));
//var cfb = XLS.CFB.read(btoa(arr), {type: ‘base64‘});
var wb = XLS.parse_xlscfb(cfb);
process_wb(wb);
};
reader.readAsBinaryString(f);
//reader.readAsArrayBuffer(f);
}
}
function handleDragover(e) {
e.stopPropagation();
e.preventDefault();
e.dataTransfer.dropEffect = ‘copy‘;
}
if(drop.addEventListener) {
drop.addEventListener(‘dragenter‘, handleDragover, false);
drop.addEventListener(‘dragover‘, handleDragover, false);
drop.addEventListener(‘drop‘, handleDrop, false);
}
JS代码很容易理解，它使用了HTML5拖放API允许我们上传文件然后看他们为二进制字符串。二进制，然后直接传递到库，并进一步分析使用此代码：
var cfb = XLS.CFB.read(data, {type: ‘binary‘});
var wb = XLS.parse_xlscfb(cfb);
最终，WB（Workbook）对象是处理并转换成需要的格式（JSON，CSV和Excel公式）。这没有HTML5拖放文件阅读器的API，可用于Node.js代码相同。
注：此模块不支持xlsx。为了克服这一限制，我们可以通过同一作者称为JS-XLSX用另一个包。
JS-XLSX
再次，安装和使用与上一节几乎相同。使用浏览器加载jszip.js和xlsx文件：
<!-- https://github.com/SheetJS/js-xlsx/blob/master/jszip.js --> <script src="/path/to/jszip.js"></script> <!-- https://github.com/SheetJS/js-xlsx/blob/master/xlsx.js --> <script src="/path/to/xlsx.js"></script>
对于Node.js，只要通过NPM安装：
$ npm install xlsx $ node > require(‘xlsx‘).readFile(‘excel_file.xlsx‘);
我们可以再次使用项目中的index.html提供代码转换xlsx JSON，CSV或公式为基础的输出。
function get_radio_value( radioName ) {
var radios = document.getElementsByName( radioName );
for( var i = 0; i < radios.length; i++ ) {
if( radios[i].checked ) {
return radios[i].value;
}
}
}
function to_json(workbook) {
var result = {};
workbook.SheetNames.forEach(function(sheetName) {
var roa = XLSX.utils.sheet_to_row_object_array(workbook.Sheets[sheetName]);
if(roa.length > 0){
result[sheetName] = roa;
}
});
return result;
}
function to_csv(workbook) {
var result = [];
workbook.SheetNames.forEach(function(sheetName) {
var csv = XLSX.utils.sheet_to_csv(workbook.Sheets[sheetName]);
if(csv.length > 0){
result.push("SHEET: " + sheetName);
result.push("");
result.push(csv);
}
});
return result.join("\n");
}
function to_formulae(workbook) {
var result = [];
workbook.SheetNames.forEach(function(sheetName) {
var formulae = XLSX.utils.get_formulae(workbook.Sheets[sheetName]);
if(formulae.length > 0){
result.push("SHEET: " + sheetName);
result.push("");
result.push(formulae.join("\n"));
}
});
return result.join("\n");
}
var tarea = document.getElementById(‘b64data‘);
function b64it() {
var wb = XLSX.read(tarea.value, {type: ‘base64‘});
process_wb(wb);
}
function process_wb(wb) {
var output = "";
switch(get_radio_value("format")) {
case "json":
output = JSON.stringify(to_json(wb), 2, 2);
break;
case "form":
output = to_formulae(wb);
break;
default:
output = to_csv(wb);
}
if(out.innerText === undefined) out.textContent = output;
else out.innerText = output;
}
var drop = document.getElementById(‘drop‘);
function handleDrop(e) {
e.stopPropagation();
e.preventDefault();
var files = e.dataTransfer.files;
var i,f;
for (i = 0, f = files[i]; i != files.length; ++i) {
var reader = new FileReader();
var name = f.name;
reader.onload = function(e) {
var data = e.target.result;
//var wb = XLSX.read(data, {type: ‘binary‘});
var arr = String.fromCharCode.apply(null, new Uint8Array(data));
var wb = XLSX.read(btoa(arr), {type: ‘base64‘});
process_wb(wb);
};
//reader.readAsBinaryString(f);
reader.readAsArrayBuffer(f);
}
}
function handleDragover(e) {
e.stopPropagation();
e.preventDefault();
e.dataTransfer.dropEffect = ‘copy‘;
}
if(drop.addEventListener) {
drop.addEventListener(‘dragenter‘, handleDragover, false);
drop.addEventListener(‘dragover‘, handleDragover, false);
drop.addEventListener(‘drop‘, handleDrop, false);
}文章来自：http://www.cnblogs.com/qxm9423/p/6829156.html